Sigma 17-50mm f/2.8 EX DC OS HSM FLD Lens

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Perfect for Many Photographic Situations Particularly Portraits and Landscapes

Sigma 17-50mm F2.8 EX DC OS HSM Lens A standard zoom lens that covers a starting focal length of 17mm wide angle which provides a large f/2.8 aperture all the way through the whole zoom range, rendering it perfect for many photographic situations particularly portraits and landscapes. The Sigma anti shake function (OS) allows using shutter speeds up to 4 stops less than could otherwise be feasible. The OS function lets Sony and Pentax shooters the option of composing a stabilized image looking through the viewfinder, a function offered by Sigma only. HSM is fast and quiet autofocus.

Sigma produces their own brand FLD glass elements, that perform equal to fluorite integrated with a pair of glass mold and a single hybrid aspherical lens, combined to provide excellent adjustments for all sorts of aberrations. A Super Multi-Layer coat cuts down on flare and ghosting. Additionally the lens boasts exceptional peripheral luminance and captures crisp, high contrast photos even while at maximum aperture settings. Also the minimum focusing distance is only 11 inches all the way through the entire zoom distance and a 1:5.magnification ratio It is also possible to focus in as close as 4.7cm(1.9in.) distance from the lens tip to the scene making it particularly useful for shooting close-up photography. For those times when you need be ready for any photographic moment a fast aperture comes in handy so you can capture images in low available light or at the maximum range using a flash. It's a perfect Sigma lens with it's compact dimensions and very light in weight, making it a welcome addition to your existing camera gear

The big F2.8 aperture rounded 7 blade diaphragm generates an attractive blurred background to out of focus zones and increases autofocus speed. The inner focusing structure eliminates rotation of the front lens, allowing it to be particularly suitable for attaching the included petal-style lens hood and also circular polarizing filters.

Note! Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

HSM means this lens will autofocus on Nikon D40/D40x, Nikon D60, Nikon D3000, Nikon D3100 Nikon D5000 and the Nikon D5100  Apr 18, 2011 ✓


For DSLRs with APS-C Size Sensors
4 Stops of Anti-Shake (OS) Compensation
Aperture of f/2.8 throughout Zoom Range
Accepts 77mm Filters
Ultra Compact (Only 3.6", 91.8mm Long)
Multi-Layered Lens Coating
Excellent Correction for Aberrations
Hyper-Sonic Motor for Quiet/Fast AF
Close Focusing Distance of 11" (28cm)
Weighs Only 19.9 oz (565 g)
The DC designation for the smaller size (APS-C) of the image sensor of your digital SLR.
Constructed with 17 elements in 13 groups, it features FLD ("F" Low Dispersion) glass
Sigma lenses are made in Japan.

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Lens styleZoom lens
Max Format Size APS-C / DX  
Lens focal length17 50 mm  
Stabilization type Yes (4 stops claimed)  
Camera mount Canon EF, Pentax KAF3, Sony Alpha, Sigma SA, Nikon F (DX)  
Angle of view 72.4-27.9  
Aperture (lens diaphragm)
Largest aperture opening F2.8  
Smallest aperture opening F22.0  
Includes aperture ring No  
Total diaphragm blades 7  
Aperture annotations Rounded diaphragm  
Total Elements 17  
Number of Groups 13  
Coatings / special elements 2 FLD glass elements 2 glass mold elements 1 hybrid aspherical lens  
Minimum focus distance 0.28 m (11.02")  
Maximum magnification ratio 0.2 x  
Autofocus type Yes  
Full time manual focus No  
Focusing method Internal  
Focus notes For Pentax mount, AF will not function with DSLR cameras that do not support HSM  
Lens distance scale Yes  
Depth of field scale No  
Focus distance limiter No  
Physical features
Overall weight565 g (1.25 lb)  
Lens diameter 84 mm (3.29")  
Overall length 92 mm (3.62")  
Construction materials Metal mount  
Sealing No  
Zooming method Rotary (extending)  
Filter thread size 77 mm  
Filter annotations Does not rotate on focusing  
Lens hood included Yes  
Tripod collar included No

Lens Includes

Sigma 17-50mm F2.8 EX DC OS HSM Lens Hood

Sigma 17-50mm F2.8 EX DC OS HSM Zoom Lens
Lens Hood
1-Year International Warranty plus 3 Additional Years in the USA


Sigma 17-50mm F2.8 EX DC OS HSM Lens

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